Rotary presser bar for veneer machines



Jan. 29, 1935. A. A. TALLQUIST Er AL ROTARY PRESSER BAR FOR VENEER MACHINES F11ed July 11, 1951 z2 zj l ma j af fw I INVENI'ORS.' Hare] ./Z. Tal/gabs?" Q4 Greer W Patented Jan. 29, 1935 um'rsof stars l lastest ROTARY gerissen BAB. FOR VENEERl LAxel AQ MACHINES Tailquist,` Seattle, -Wash., and George' Haumann, Painesville, Ohio .Application Jury 11, 1931,seria1 No, 556,150 .y

n claims. (o1. iai-213) This invention relates to an improved structural arrangement for supporting the rotary bar member comprising the presser attachment of a veneer-wood machine, 'and also to the method of collectively lubricating the same and eliminating therefrom such foreign matter as is collected by reason of the character of the work.

The object, generally stated, is the provision of a rotary presser bar for such'character of machines capable of eicient service in the presence of the resinous and other substances or particles in or on the wood heretofore adhering to the rotary presser member.

A more particular Objectis the provision of a lubricating and iiushing system for the rotary bar so constituted as to cut such resinous or other detrimental substances.

A further object resides in the. provision of a lubricant such as water or s eam which will not damage the surface of the veneer product by a staining of the same. 1

A still further object is the provisionof clamping mechanism for the rotary presserl member susceptible to a slight spring of the retaining jaws.

The foregoing together with further and more particular objects and advantages will become apparent throughout the course of the following description and claims, the invention consisting in the novel constructionfadaptation and combination of parts hereinafter'described and claimed.

Inthe drawing:

Figure 1 is a transverse vertical section representing the preferred embodiment of the present invention, and fragmentarilytherewith, the supporting frame and cutting arrangement of the conventionally used veneer machine.

Fig. 2 is a front elevation of the presser bar attachment, eliminating a showing of the sprocket and drive chain for the rotary member.

Fig. 3 is a rear elevation thereof; and

Fig. 4 is a transverse vertical sectionv of the invention taken at variance to that of the section of Fig. 1 and to an enlarged scale therefrom.

Reference being had thereto, the letter L designates (Fig. 1) a log in the process of being cut circumferentially of its periphery to produce a strip of wood veneering such as designated by S, said cutting afforded through the medium of a knife, represented by the numeral 5, supported in the slot 6 of a knife bar 7 and acting in conjunction with the extreme pressure afforded by a presser member supported within a frame, to prevent the desired cutting action of the knife developing into a split.

As conventionally formed, said frame comprises a body 8.cut away along its upper face to provide a triangular slot forthe seating reception ofv a member 9, said member serving, through the medium or fbolts 10, as agclamp forretaining a pair of `co-operating pressure blocks 11, 12, introduced in a longitudinal channel formed therebetween andthebodyS. .5, J

Said blocks, constituting, with a, flush system hereinafter described, the inventive development,

are constructed of a suitable metaland project the length of the frame :with the upper block lfl being rectangular in transverse 'sectionand having rthe lowerface of the outeriedge concaved as at 13 to provideajaw. l I f.

The'main block 12, havingy a'major concavity le in. its outer'edge acting as a :co-operative. jaw tothat'of'the block 11 for^collectively receiving a' rotary barsuchas 1'5 therebetween, is formed to provide parallely upper. and lower faces 16, 17, with the former cut away to provide a Vertical face 18 Yof a height exceedingy the depth of block 1l and serving asia shoulder for the same. rThe facing surface 19 from said shoulder receding at an inclination from the horizontal to the lip of the cavity, withlongitudinally-spaced.cap screws 20 passed through said block 11 medially of its width for thread reception in-.the block 12, affords a fulcrum arrangement most emcient in obtaining a yieldable grip to thejaw of block 11 over the barl. The interstice formed along the upper faceofblock 11 by reason of the projection of theclamped face 16v of block 12 thereabove, accommodates a slightv spread reaction to presenceof any small particles working into the bearing face ofthe jaws.

More particularly to the aforementioned lubricant, we introduceV admixed steam and hot water from a pressure supply rconduit such as 21 through ttings 22 'to passages 23 bored through the frame body,said passages communicating with aligned passages 24 of `the block l2 and the stream feeding therefrom to the space formed above the inclined face 19 to continuously iiush the inwardly exposed surface of the revolving presser bar 15. c

In Obviating a corrosive action onthe rotary bar, it is desirable that a non-ferrousy material such as bronze, monel metal, 'or the like be used.

The invention is believedclear fromJthe foregoing, the use of a continuous steam and water flush most efficiently cleansing the rotary bar of such ingredients from the wood as have heretofore frictionally retarded the efficiency of the same by impairing the bearing surface therebetween and the lower or main jaw. The use of such a character of ush, moreover, obviates the impartation of a stain from the rotating presser bar to the veneer product from the log.

While illustrating and describing the preferred development of the present invention, it is not our intention to in any Wayconne the same except as may be limited by the scope of the hereto annexed claims.

What we claim, is,- Y

1. rIhe combination with the rotary presser bar of a veneer machine, and the supporting frame therefor, said frame including two boltably interconnected horizontal members forming a longitudinally disposed horizontal slot therebetween, of a pair of separated superposed bearing blocks detachably clamped in said slot to have outer edges of the same protrude from the clamping members, the upper of saidblocks having a concavity in the lower face of its protruding portion, the lower of said blocks having a concavity in the upper face of its protruding portion, bolts connecting said blocks for gripping the rotary bar in said concavities to have the rear face of its revolving surface exposed to the space between said blocks, a steam and hot water pressure supply, and means for introducing said steam and hot water to the space between said blocks.

2. The combination in a veneer machine, of the rotary presser bar'therefor, the supporting frame for said presser bar, said frame providing a horizontal shelf, a bearing block adapted for seating engagement on said shelf, said bearing block providing a concavity in the upper face of its outer edge and an upstanding rib along the upper face of its inner edge, a complementary bearing block of a height less than the height of said rib seating over said iirst named block and forwardly of said rib, said complementary bearing block having a concavity in the lower ,face of its outer edge co-operating with the aforesaid concavity for collectively supporting said rotary bar, bolts interconnecting said blocks rearwardly of said concavities, and a clamping member boltably con# nected with said frame and engageable over said rib for clamping said first named block therebetween and the frame.

3. The combination in a veneer machine, of a rotary presser bar, a supporting frame providing a horizontal shelf element, a pair of separated boltably interconnected complementary bearing blocks seating over said shelf and collectively supporting the rotary bar therebetween to have the rear face of its revolving surface exposed to the space between said blocks, a clamping member for 'securing said shelf-supported blocks with respect to said frame, a steam and Water pressure supply, and means for introducing said steam and water to the space between said blocks.

4. The combination in a veneer machine, of a rotary presser bar, a supporting frame providing a horizontal shelf element,` a pair of separated boltably interconnected complementary bearing blocks seating over said shelf and collectively supporting the rotary bar therebetween to have the rear face of its revolving surface exposed to the space between said blocks, a clamping member for securing said shelf-supported blocks with respect to said frame, a steam supply, and means for introducing said steam to the space between said blocks.

5. The combination in a veneer machine, of a rotary presser bar, a supporting frame providing a horizontal shelf element, a pair of separated boltably interconnected complementary bearing blocks seating over said shelf and collectively supporting the rotary bar therebetween to have the rear face of its revolving surface exposed to the space between said blocks, a clamping member for securingA said shelf-supported blocks with respect to said frame, a Water supply, and means for introducing said water to the space between said blocks.

6. The combination in a veneer machine, of a rotary presser bar, a supporting frame providing a horizontal shelf element, a pair of boltably interconnected complementary bearing blocks seating over said shelf and collectively supporting the rotary bar therebetween, and clamping means engaging one of said members only for securing said blocks with respect to the frame.

'7. The combination in a veneer machine, of a rotary presser bar, a supporting frame, a pair of complementary bearing blocks collectively supporting the rotary bar therebetween, means to secure one of said blocks only with respect to the frame, and means to secure the other of said blocks with respect to the frame-secured block to afford a spring relationship between the respective bar supporting portions of the blocks.

8. The combination in a veneer machine, of a rotary presser bar, a supporting frame, a pair of complementary bearing blocks collectively supporting the rotary bar therebetween, means to secure one of said blocks only with respect to the frame, means to secure the other of said blocks with respect to the frame-secured block to afford a spring relationship between the respective bar supporting portions of the blocks, and means for supplying a lubricant to said rotary bar.

9. In a veneer machine, in combination, a rotary presser bar, a pair of spaced complementary bearing blocks collectively supporting the rotary bar to have the rear face of its revolving surface exposed to the space between said blocks, and means for introducing steam and hot water under pressure to the space between said blocks.

10. The method of eliminating resinous substances from the rotary presser bar of a veneer machine, which consists in cutting the resinous substances by application of steam.

11. In a veneer machine, the combination of a rotary presser bar, a supporting frame providing a longitudinally extending recess, a block seating in and projecting from saidrecess having abearing along its outer edge, means for securing said block with respect to the frame, a complementary block seating over said first-named block and co-acting therewith in supporting the rotary presser bar therebetween, said last-named block being of a thickness affording a space between the same and the upper wall of the recess, and means engaging said blocks one to the other rearwardly of the bearing for the rotary presser bar to afford a spring reaction of the upper bar into said space in clearing the bar of foreign substances adhering to the surface of the same.

AXEL A. TALLQUIST. GEORGE HAUMANN. 

